Access

You are not currently logged in.

Access your personal account or get JSTOR access through your library or other institution:

login

Log in to your personal account or through your institution.

If You Use a Screen Reader

This content is available through Read Online (Free) program, which relies on page scans. Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.

Effect of Radio Transmitters on Return Rates of Swainson's Warblers

Nicholas M. Anich, Thomas J. Benson and James C. Bednarz
Journal of Field Ornithology
Vol. 80, No. 2 (Jun., 2009), pp. 206-211
Published by: Wiley on behalf of Association of Field Ornithologists
Stable URL: http://www.jstor.org/stable/27715331
Page Count: 6
  • Read Online (Free)
  • Subscribe ($19.50)
  • Cite this Item
Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Effect of Radio Transmitters on Return Rates of Swainson's Warblers
Preview not available

Abstract

Although radio telemetry can provide useful information, the possible negative effects of transmitters, including biased results and detrimental effects on the birds, must also be considered. Several investigators have examined the effects of transmitters on larger birds, but few have examined their possible long-term effects, as assessed by return rates, on small passerines. We examined the possible negative effects of transmitters on a small (15.5 g) passerine. We used glue to attach radio transmitters to 40 male Swainson's Warblers (Limnothlypis swainsonii) at two study sites in Arkansas in 2005 and 2006. To assess possible effects of transmitters on survival, we compared the following-year return rates of radio-tagged birds to birds that were captured and color banded, but did not receive transmitters. Least squared mean return rates for all birds ranged between 0.46 and 0.57. We found no significant difference in the following-year return rate of radio-tagged and nonradio-tagged birds. In addition, we found no significant differences in return rates between study sites or years, and no significant interactions between any combination of radio transmitter (radio tagged or not), site, and year. Our results indicate that attachment of transmitters did not affect return rates of male Swainson's Warblers and that the glue-on technique is a good option for short-term studies of small passerines. /// Aunque la radiotelemetría puede proveer de información de utilidad, el posible efecto negativo de estos, incluyendo sesgo en la información y efecto detrimental, también debe tomarse en consideración. Varios investigadores han examinado los efectos de radiotransmisores en aves grandes, pero pocos han examinado la posibilidad de efectos a largo alcance, evaluando las tasas de retorno de individuos, en paserinos pequeños. Examinamos el posible efecto negativo de los radiotransmisores en aves pequeñas (15.5 g). Durante el 2005 y el 2006 en investigaciones realizadas en dos sitios de estudio en Arkansas, usamos pegamento para adherir radiotransmisores a 40 machos de la Reinita de Swainson (Limnothlypis swainsonii). Para determinar el posible efecto de los radiotransmisores en la sobrevivencia, comparamos la tasa de retorno de individuos a los cuales se les colocaron transmisores con individuos capturados y marcados con anillos de colores. Las tasas promedio de retorno, para todas las aves variaron entre 0.46 y 0.57. No encontramos diferencia significativa en la tasa de retorno, durante el primer año, entre ambos grupos estudiados. Además, no encontramos diferencia significativa en la tasa de retorno entre individuos en diferentes años o de diferentes localidades y ninguna interacción significativa en ninguna combinación de aves con transmisores, localidad del estudio o año de trabajo. Nuestros resultados indican que el uso de radiotransmisores no altera la tasa de retorno en el ave estudiada, y que la récnica de utilizar pegamento para anclar los radiotransmisores es una buena opción para estudios de corto alcance con paseriformes pequeños.

Page Thumbnails

  • Thumbnail: Page 
206
    206
  • Thumbnail: Page 
207
    207
  • Thumbnail: Page 
208
    208
  • Thumbnail: Page 
209
    209
  • Thumbnail: Page 
210
    210
  • Thumbnail: Page 
211
    211